What role does the sun play in global climate?
as you know :
The sun transfers heat energy to the earth. However, this heat energy is received unevenly, resulting in the global circulation of air and heat that drives our weather and produces the wide range of climates we see.
Variations in the Earth's surface (such as water, ice, mountains, forests, bare rock, etc.) absorb or reflect this heat energy differently.
In addition, due to the curvature of the earth, the equatorial region receives the most heat energy from the sun. However, even at the equator, heat energy is not always received directly because the Earth's rotational axis is tilted approximately 23.5 degrees relative to the Sun. As a result of this slope, the amount of radiation received by each place during a year is different.
creates the seasons;
This deviation in the earth's axis along with its rotation around the sun is responsible for our seasons. Northern Hemisphere winter (from December to February) occurs when the Earth's North Pole axis moves away from the Sun.
At the same time, the axis of the South Pole is towards the Sun, exposing the Southern Hemisphere to more heat energy, and thus it is summer. During these three months, daylight hours are shortest for the Northern Hemisphere and longest for the Southern Hemisphere.
Six months later, the Earth completed half its rotation around the Sun and the seasons reversed. June, July and August are summer in the Northern Hemisphere and winter in the Southern Hemisphere. The length of daylight hours also varies, with the longest daylight hours in the Northern Hemisphere and the shortest in the Southern Hemisphere.
Twice a year, around March 21 and September 23, both hemispheres receive the same amount of solar radiation. These two days are called the equinox, which means equal night when both hemispheres have 12 hours of daylight and darkness.
No, it isn’t the driving force behind today’s global warming. In the past five decades, although the planet’s average temperature has soared to new heights, the Sun’s energy output has increased or decreased by only 0.1%, according to the NASA report, published in 2019. This is one of the reasons why scientists don’t believe that the Sun is responsible for current global warming. The Sun is the primary source of energy that fuels biological and physical processes on Earth. Its heat makes liquid water, helps plants to grow, and warms air that influences our weather system. The Sun can influence Earth’s climate, but it isn’t responsible for the warming trend we’ve seen over recent decades. The Sun is a giver of life; it helps keep the planet warm enough for us to survive. We know subtle changes in Earth’s orbit around the Sun are responsible for the comings and goings of the ice ages. But the warming we’ve seen in recent decades is too rapid to be linked to changes in Earth’s orbit and too large to be caused by solar activity.
Dear Prem Babu:
B.Tech (Chemical Engineering), M.Sc (Ecology and Environment), M.Phil (Environmental Sciences), M.B. Retired Executive from DGM (Production and Process) Dangote Fertilizers Nigeria and Sr. Manager National Fertilizers Ltd. India at Institute of Engineers (India)
India:
Greetings and respect. Thank you very much for your logical answer
I'm sorry Thank you Abbas
Prem Baboo INRE:"driving force behind today’s global warming". There is still controversy about that. First, we simply have no direct long term record of the exo-atmospheric unfiltered solar output in all the significant wavelengths, and the significance itself is really, really complicated along many pathways. ( a decade old, but still covers the main points fairly well: https://science.nasa.gov/science-research/planetary-science/08jan_sunclimate/ ). Along with that, it is only the latest generation of Earth observation satellites and airborne surveys ( https://journals.ametsoc.org/view/journals/bams/103/3/BAMS-D-20-0315.1.xml ) that provide continuous global inventory of the chemical constituents of the entire atmospheric column. We only have a decade of data from the Solar Dynamics Observatory ( https://sdo.gsfc.nasa.gov/mission/science.php ).
Dear Michael John Patrick
Alumni of the University of Washington, Seattle
United States
Greetings and respect. Thank you very much for your logical and good answer. Abbas